BCAL Hybrid Module Cosmic Tests
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Contents |
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Cosmic Images
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Trigger Arrangement
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Plateaus
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Gain Matching
The following plot shows the ratio of mean ADC channels (away from the pedestal) for the BCAL PMTs set at different high voltages. The x-axis can be read as: 1=NB; 2=NT; 3=SB; 4=ST. The flat lines are the expected ratios based on the typical responsivity curve as given in the specs sheet for Burle 8575 PMTs. From that curve, at 2500V gain = 1.5x106, at 2300V gain = 7x105, and at 2100V gain = 2.7x105.
